Adding a 3rd story in Philly

[Marlon Long]

I need help Philly Rehabbers!!!! BP is the best forum to find out the answer to my time-sensitive question. I am under contract with a property in Point Breeze.  It has great flip potential, but not without the a 3rd story. 

Here's the dilemma, the home is attached between 2 to 2-story homes, I looked up the zoning for this property and its RSA-5. I have heard that you cannot build a 3rd story straight up that doesn't match the 2 homes on each side. The requirement is that the 3rd floor set back a minimum of 8' in the front.  

Has anyone else had experience in adding this additional level? any suggestions on contractors and the like. Any advice or feedback would be greatly appreciated.

Thanks in advance,

Marlon